”The Long Range Acoustic Device (LRAD) is a sound cannon or ‘non-lethal’ sonic weapon that is capable of broadcasting sounds at an extreme loudness over a long distance. The LRAD is frequently deployed by law enforcement around the world to neutralize protesters and for crowd control. When used at maximum volume, LRAD is capable of inducing permanent hearing impairment. LRAD is also used to repel birds on private properties. This is achieved by broadcasting distressed-bird calls.

Canon is comprised of a sound installation and live performance, which is experienced at two different locations. At the ‘broadcasting’ location, with an LRAD unit the artist performs the calls of birds, in response to a background track that is consisted of recordings of actual bird calls.”